Best Gateways for the GPT-Image-2 API

What is the GPT-Image-2 API?

GPT-Image-2 is OpenAI’s image-generation model, called through the OpenAI images endpoint and billed per image. You can use it directly with an OpenAI API key (platform.openai.com → API keys), or through an OpenAI-compatible gateway so images and text share one key and one balance.

Generate images through one gateway key

An AI API gateway lets you call the GPT-Image-2 API with the same key you use for GPT and Claude text models — useful when an app needs both. Novarelay, our top pick, exposes GPT-Image-2 on an OpenAI-compatible image endpoint at up to 20% below direct pricing, with pay-as-you-go credits from $1 and unified usage logs. CometAPI and AiHubMix also support GPT-Image-2, including free tiers to prototype.

How is the GPT-Image-2 API priced?

GPT-Image-2 is billed per generated image rather than per token, with the price depending on resolution and quality. A discount gateway can lower the effective cost on the same model.

Can I call GPT-Image-2 with the OpenAI SDK?

Yes. GPT-Image-2 uses the OpenAI images endpoint, so the OpenAI SDK works directly — or point it at an OpenAI-compatible gateway base URL and use the gateway key.

Which gateways support GPT-Image-2?

Novarelay, CometAPI and AiHubMix all expose GPT-Image-2 through an OpenAI-compatible API; AiHubMix and CometAPI also offer free tiers to test image generation.

Last updated: July 2026 · Independent comparison, funded by referral commissions. Model names and trademarks (OpenAI, ChatGPT, GPT, Anthropic, Claude, Google, Gemini) belong to their respective owners and are used for identification only. Pricing is set by each provider and can change — always verify before you build.